21841201 has 8 divisors (see below), whose sum is σ = 22196160. Its totient is φ = 21488592.

The previous prime is 21841177. The next prime is 21841207. The reversal of 21841201 is 10214812.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21841201 is a prime.

It is a super-2 number, since 2×21841201² = 954076122244802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21841207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29431 + ... + 30163.

It is an arithmetic number, because the mean of its divisors is an integer number (2774520).

Almost surely, 2^21841201 is an apocalyptic number.

It is an amenable number.

21841201 is a deficient number, since it is larger than the sum of its proper divisors (354959).

21841201 is an equidigital number, since it uses as much as digits as its factorization.

21841201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1175.

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 21841201 is about 4673.4570715906. The cubic root of 21841201 is about 279.5281210139.

The spelling of 21841201 in words is "twenty-one million, eight hundred forty-one thousand, two hundred one".